松木桩拦挡配置灌木护坡技术效果研究

Study on the effects of slope protection technique by shrub vegetation and pine wood piles

简述了松木桩拦挡配置灌木护坡技术的方法原理及施工要点,并以北京市延庆县上辛庄水土保持试验基地松木桩拦挡配置灌木护坡试验小区为例,对扦插植物的生长情况、成活率以及小区内土壤的理化性质进行了分析。结果表明:紫穗槐、沙棘生长良好,改良土壤效果显著;施工4年后,紫穗槐、沙棘的新枝高度分别平均增长到132、117.2 cm,新枝基径分别平均增长到0.93、1.33 cm;与空白对照小区相比,扦插紫穗槐区域的土壤有机质含量增加5.06 g/kg,全氮增加0.02 g/kg,速效磷增加5.62 mg/kg,速效钾增加20.55 mg/kg,pH值下降0.11;扦插沙棘区域的土壤有机质含量增加10.15 g/kg,全氮增加0.05 g/kg,速效磷增加5.82 mg/kg,速效钾增加28.06 mg/kg,pH下降0.18。说明沙棘适应性强,改良土壤的作用优于紫穗槐;松木桩拦挡配置灌木护坡技术水土保持效果显著,值得大力推广。

In order to discuss the effects of slope protection technique by shrub vegetation and pine wood piles on protecting slopes, this paper briefly described its method principles and construction main points. To take the plots, which located in Shangxinzhuang experimental station of water and soil conservation in Yanqing county of Beijing, applied slope protection by shrub vegetation and pine wood piles for instance, we analyzed the growth and the survival rates of cutting plants, and the physical and chemical properties of soil. The results showed that A morphafruticosa L. and Hippophae rhamnoides Linn. both grew well, so that it brought a striking effect on improving the qualities of soil. Four years after finishing construction, the heights of new branches respectively increased to 132 cm, 117.2 cm at average, and the diameters of new branches average grew to 0.93 cm, 1.33 cm, respectively. Compared with the blank control plot, the soil organic matter, total N, available P and available K from cutting A morpha fruticosa L. plots increased 5.06, 0.02, 5.62, 20.55 mg/kg, respectively, while PH decreased by 0.11. The soil organic matter, total N, available P and available K from cutting Hippophae rhamnoides Linn. plots increased 10.15, 0.05, 5.82, 28.06 mg/kg, respectively, while PH decreased by 0.18. The results indicated that the adaptability and the effects of improving soil of Hippophae rhamnoides Linn. were better than those of Amorphafruticosa L.. It was worth to promot the application of slope protection technique by shrub vegetation and pine wood piles which was very efficient in water and soil conservation.